[INFO] fetching crate elba 0.3.0...
[INFO] testing elba-0.3.0 against 1.60.0 for beta-1.61-1
[INFO] extracting crate elba 0.3.0 into /workspace/builds/worker-20/source
[INFO] validating manifest of crates.io crate elba 0.3.0 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate elba 0.3.0
[INFO] finished tweaking crates.io crate elba 0.3.0
[INFO] tweaked toml for crates.io crate elba 0.3.0 written to /workspace/builds/worker-20/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ascii v0.9.3
[INFO] [stderr]   Downloaded shell-escape v0.1.5
[INFO] [stderr]   Downloaded hyper v0.12.36
[INFO] [stderr]   Downloaded rand v0.5.6
[INFO] [stderr]   Downloaded petgraph v0.4.13
[INFO] [stderr]   Downloaded memoffset v0.2.1
[INFO] [stderr]   Downloaded parking_lot v0.6.4
[INFO] [stderr]   Downloaded crossbeam-deque v0.5.2
[INFO] [stderr]   Downloaded parking_lot_core v0.3.1
[INFO] [stderr]   Downloaded scopeguard v0.3.3
[INFO] [stderr]   Downloaded crossbeam-channel v0.2.6
[INFO] [stderr]   Downloaded serde-hjson v0.8.2
[INFO] [stderr]   Downloaded linked-hash-map v0.3.0
[INFO] [stderr]   Downloaded crossbeam-epoch v0.6.1
[INFO] [stderr]   Downloaded serde_test v0.8.23
[INFO] [stderr]   Downloaded toml_edit v0.1.5
[INFO] [stderr]   Downloaded symlink v0.1.0
[INFO] [stderr]   Downloaded config v0.9.3
[INFO] [stderr]   Downloaded clicolors-control v0.2.0
[INFO] [stderr]   Downloaded console v0.6.2
[INFO] [stderr]   Downloaded termios v0.3.3
[INFO] [stderr]   Downloaded directories v1.0.2
[INFO] [stderr]   Downloaded lock_api v0.1.5
[INFO] [stderr]   Downloaded owning_ref v0.4.1
[INFO] [stderr]   Downloaded slog-term v2.9.0
[INFO] [stderr]   Downloaded crossbeam v0.4.1
[INFO] [stderr]   Downloaded redox_users v0.4.3
[INFO] [stderr]   Downloaded crossbeam-epoch v0.5.2
[INFO] [stderr]   Downloaded url_serde v0.2.0
[INFO] [stderr]   Downloaded textwrap v0.10.0
[INFO] [stderr]   Downloaded combine v3.8.1
[INFO] [stderr]   Downloaded crossbeam-utils v0.5.0
[INFO] [stderr]   Downloaded fwdansi v1.1.0
[INFO] [stderr]   Downloaded ordermap v0.3.5
[INFO] [stderr]   Downloaded semver_constraints v0.1.0
[INFO] [stderr]   Downloaded simsearch v0.1.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 23bb7d8edcad87abb80ec9e47cd930d1c170dd1c6225a88825341285dbed1de8
[INFO] running `Command { std: "docker" "start" "-a" "23bb7d8edcad87abb80ec9e47cd930d1c170dd1c6225a88825341285dbed1de8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "23bb7d8edcad87abb80ec9e47cd930d1c170dd1c6225a88825341285dbed1de8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23bb7d8edcad87abb80ec9e47cd930d1c170dd1c6225a88825341285dbed1de8", kill_on_drop: false }`
[INFO] [stdout] 23bb7d8edcad87abb80ec9e47cd930d1c170dd1c6225a88825341285dbed1de8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 74c8f316cba885c9a175b95a3c9b931f5a43b60bbf1b39774554922c2425fc83
[INFO] running `Command { std: "docker" "start" "-a" "74c8f316cba885c9a175b95a3c9b931f5a43b60bbf1b39774554922c2425fc83", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling pkg-config v0.3.25
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling futures v0.1.31
[INFO] [stderr]    Compiling unicode-bidi v0.3.7
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling httparse v1.7.0
[INFO] [stderr]    Compiling openssl v0.10.38
[INFO] [stderr]    Compiling memoffset v0.2.1
[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]    Compiling serde v0.8.23
[INFO] [stderr]    Compiling openssl-probe v0.1.5
[INFO] [stderr]    Compiling crossbeam-utils v0.5.0
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling parking_lot_core v0.9.2
[INFO] [stderr]    Compiling native-tls v0.2.10
[INFO] [stderr]    Compiling encoding_rs v0.8.31
[INFO] [stderr]    Compiling byte-tools v0.2.0
[INFO] [stderr]    Compiling time-macros v0.2.4
[INFO] [stderr]    Compiling slog-async v2.7.0
[INFO] [stderr]    Compiling num_threads v0.1.5
[INFO] [stderr]    Compiling ascii v0.9.3
[INFO] [stderr]    Compiling ordermap v0.3.5
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling take_mut v0.2.2
[INFO] [stderr]    Compiling fixedbitset v0.1.9
[INFO] [stderr]    Compiling rust-ini v0.13.0
[INFO] [stderr]    Compiling symlink v0.1.0
[INFO] [stderr]    Compiling shell-escape v0.1.5
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling indexmap v1.8.1
[INFO] [stderr]    Compiling tinyvec v1.5.1
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling lock_api v0.3.4
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling owning_ref v0.4.1
[INFO] [stderr]    Compiling thread_local v1.1.4
[INFO] [stderr]    Compiling crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling try_from v0.3.2
[INFO] [stderr]    Compiling miniz_oxide v0.5.1
[INFO] [stderr]    Compiling base64 v0.10.1
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling textwrap v0.10.0
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.37
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling termios v0.3.3
[INFO] [stderr]    Compiling filetime v0.2.15
[INFO] [stderr]    Compiling xattr v0.2.2
[INFO] [stderr]    Compiling clicolors-control v0.2.0
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling directories v1.0.2
[INFO] [stderr]    Compiling generic-array v0.9.1
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling block-buffer v0.3.3
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr] error: could not compile `serde`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name serde /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-0.8.23/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' --cfg 'feature="std"' -C metadata=5a7e52bf66fde6b4 -C extra-filename=-5a7e52bf66fde6b4 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "74c8f316cba885c9a175b95a3c9b931f5a43b60bbf1b39774554922c2425fc83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74c8f316cba885c9a175b95a3c9b931f5a43b60bbf1b39774554922c2425fc83", kill_on_drop: false }`
[INFO] [stdout] 74c8f316cba885c9a175b95a3c9b931f5a43b60bbf1b39774554922c2425fc83